[misc] Improve just a bit the way the jobs (Tasks) are displayed.
FILEMAN-42: Change the root node to act like a folder
* Remove white space from the FileManager.WebHome title
* Modify the query that gets the orphan files to ignore the root files (direct children of the drive node)
* Extend the drive service with the ability to create child files and to retrieve them
* Change the type of the drive node to 'folder'
* Add two more entries to the drive menu: Create File and Download
* Return proper HTTP error code in the File Manager services (sheets) when the specified action is not supported
* Move #createFile and #getChildFiles from the folder sheet to Macros so that they can be reused in the drive sheet
* Include the drive node in the file/folder paths